How Many Doses Are in a Peptide Vial?
Consumption math for inventory planning
5 min readQuick Answer:
Doses per vial = vial size (mg) / dose per injection (mg). A 5mg BPC-157 vial at 250mcg per injection = 20 doses. At twice daily, that's 10 days per vial. Multiply by protocol length to know how many vials to order.
The Formula
Days per vial = Doses per vial / Injections per day
Vials needed = Protocol length (days) / Days per vial
Titer counts doses remaining per vial.
Automatic depletion tracking. Alerts when it's time to reorder.
Common Compounds at Standard Doses
| Compound | Vial Size | Dose | Doses/Vial | Freq | Days/Vial |
|---|---|---|---|---|---|
| BPC-157 | 5mg | 250mcg | 20 | 2x/day | 10 |
| TB-500 | 5mg | 2.5mg | 2 | 2x/wk | 7 |
| CJC-1295 | 2mg | 100mcg | 20 | 1x/day | 20 |
| Ipamorelin | 5mg | 200mcg | 25 | 2x/day | 12.5 |
| Semaglutide | 5mg | 0.25mg | 20 | 1x/wk | 140 |
| Semaglutide | 5mg | 1.0mg | 5 | 1x/wk | 35 |
| Tesamorelin | 5mg | 1mg | 5 | 1x/day | 5 |
| GHK-Cu | 5mg | 200mcg | 25 | 1x/day | 25 |
Vials Needed for Common Cycle Lengths
BPC-157 (5mg vial, 250mcg 2x/day)
| Cycle Length | Total Injections | Vials Needed |
|---|---|---|
| 2 weeks | 28 | 2 |
| 4 weeks | 56 | 3 |
| 8 weeks | 112 | 6 |
Semaglutide (5mg vial, titration schedule)
| Phase | Dose | Weeks/Vial |
|---|---|---|
| Phase 1 | 0.25mg/wk | 20 weeks |
| Phase 2 | 0.5mg/wk | 10 weeks |
| Phase 3 | 1.0mg/wk | 5 weeks |
| Phase 4 | 2.4mg/wk | 2.1 weeks |
A single 5mg vial covers the entire Phase 1 titration (4 weeks at 0.25mg), but at maintenance dose (1mg+) you go through vials much faster.
The Multi-Compound Inventory Problem
Running BPC + CJC + Ipamorelin + Semaglutide? Each compound depletes at a different rate:
- BPC-157: new vial every 10 days
- CJC-1295: new vial every 20 days (5/2 cycling extends this)
- Ipamorelin: new vial every 12-13 days
- Semaglutide: new vial every 5-20 weeks depending on phase
These reorder dates never align. Miss one and you have gaps in your protocol. See peptide inventory math for the full planning breakdown.
Dead Volume and Waste
Insulin syringes retain 0.02-0.05ml in the hub after injection (dead volume). Over 20 injections from a single vial, this adds up:
From a 2ml reconstitution: 30% waste
Low dead-volume syringes reduce this to under 5%. Factor dead volume into your vial-duration calculations for accuracy.
Related Questions
- How to calculate peptide dose after reconstitution
- How long do reconstituted peptides last?
- Semaglutide titration schedule (week by week)
Titer tracks doses remaining and tells you when to reorder.
Enter your vial once. It counts down every injection. No spreadsheet needed.
See Plans & PricingDisclaimer: This is a calculation reference, not medical advice. Consult a healthcare provider for dosing guidance.